Originally published on ProWrestlingSheet.

WWE superstar Daniel Bryan will no longer be wrestling due to medical reasons ... and it's effective immediately -- this according to the former world champ himself.

Bryan took to Twitter today to make the surprisingly timed – yet not shocking – announcement, "Due to medical reasons, effective immediately, I am announcing my retirement. Tonight on Raw, I'll have a chance to elaborate. #gratitude"

Sources assure Pro Wrestling Sheet that Bryan's announcement is legitimate – not a storyline related bait and switch – but whether he'll play some part in WrestleMania 32 plans remain unclear.

Daniel Bryan reached the highest of highs in WWE ... main eventing WrestleMania XXX at the Super Dome in 2014 -- only to vacate the title months later due to injury.

Safe to say this video is the only way to describe how every wrestling fan feels right now.